push turn is not realy good, because u only get called by better hands.
I fold on the turn, because call flop and raise small on the turn is a often played monsterline. If u call on the turn, u have to expect a big bet on the river. As long, as Villain is unknown, or known as a tag i would simply fold on turn.
If u call the turn, u have to call this half PS bet on the river as well.

I was about to "blockbet (40%)/use timer fold" on any other river besides a draw-completing card.
At the turn I was faced with a SA/WB (i.e. somewhat ahead/way behind - draw/set-dp) so I called, to see whether a draw would complete on the river and play as played now (check/fold to over 1/2 pot) or play as stated above on a non draw completer ...

Yes, on the turn it´s a way ahaed/way behind situation. That´s why pushing isn´t good. U You only get called by better hands.
as i said, i would fold on the turn.

ok, let´s assume you called the turn. I think blockbetting the river isn´t good, because u are committed. Villains has about 40 Dollars left. You decide to make a blockbet of 19 Dollars (~40%) and Villain pushs all in.
U have to call about 21 Dollars and the pot is about 106 Dollar big. So u get Odds of ~1:5. In my opinion you can´t fold anymore.
That´s why i check/call or c/f due to the Odds on the river.

But in my opinion u have to know this on the turn and should fold, except the case u play againt a big fish or a maniac.